Arun Venugopal, host of WNYC's Micropolis, is filling in today for Leonard. Educator, writer and activist Pamela Lewis discusses, Teaching While Black: A New Voice on Race and Education in New York City, about the 11 years she spent as a public school teacher. Man Booker Prize nominee Sunjeev Sahota on his new novel, The Year of the Runaways, about four young Indian immigrants in Britain. Kai Wright, host of WNYC’s podcast, “There Goes The Neighborhood” and producer and creator Rebecca Carroll, discuss the series on gentrification. We're talking about the effects of technology on face-to-face communication and the power of conversation on today's Please Explain.